US 2019/0096041 A1Published application

Methods and system for efficient processing of generic geometric correction engine

OwnerRajasekhar Reddy Allu, Niraj Nandan +7inventors

InventorsRajasekhar Reddy Allu, Niraj Nandan, Mihir Narendra Mody, Gang Hua, Brian Okchon Chae, Shashank Dabral, Hetul Sanghvi, Vikram VijayanBabu Appia, Sujith Shivalingappa

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Abstract

An apparatus and method for geometrically correcting a distorted input frame and generating an undistorted output frame. The apparatus includes an external memory block that stores the input frame, a counter block to compute output coordinates of the output frame for a region based on a block size of the region, a back mapping block to generate input coordinates corresponding to each of the output coordinates, a bounding module to compute input blocks corresponding to each of the input coordinates, a buffer module to fetch data corresponding to each of the input blocks, an interpolation module to interpolate data from the buffer module and a display module that receives the interpolated data for each of the regions and stitch an output image. The method includes determining the size of the output block based on a magnification data.

Claims30

Dependent claims

A method for geometrically correcting an input image with a spatially adaptive slicing apparatus and generating an output frame, said method comprising the steps of:

a) allocating a size for an output frame and dividing the output frame into blocks;
each of the blocks having a block size;
the block size having a width and a height;
the width based on the pixels arranged in a line;
the height based on the number of lines;
b) capturing the input image with an optical device;
c) mapping back each of the blocks in the output frame to correspond to blocks in the input image;
d) quantifying scaling data of each of the blocks in the output frame;
e) generating a histogram from the scaling data of the output frame;
f) identifying scaling thresholds from the histogram;
g) plotting a spatial domain plot of the output frame with the scaling data and the scaling thresholds;
h) dividing the output frame into regions based on the spatial domain plot and the scaling thresholds;
i) computing and dividing each of the regions into output blocks based on the scaling thresholds and the scaling data within the region;
j) programming the spatially adaptive slicing apparatus with a size for each of the regions and a size for each of the output blocks in each of the regions;
and
k) correcting the input frame geometrically for each of the regions across the output frame, composing and displaying the output frame on a graphical device.

13 more elements

Dependencies are inferred from the claim text.